CN106199658A - Reference signal generator, electronic equipment, moving body and data communication equipment - Google Patents
Reference signal generator, electronic equipment, moving body and data communication equipment Download PDFInfo
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- CN106199658A CN106199658A CN201610329484.3A CN201610329484A CN106199658A CN 106199658 A CN106199658 A CN 106199658A CN 201610329484 A CN201610329484 A CN 201610329484A CN 106199658 A CN106199658 A CN 106199658A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/37—Hardware or software details of the signal processing chain
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/36—Constructional details or hardware or software details of the signal processing chain relating to the receiver frond end
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/26—Automatic control of frequency or phase; Synchronisation using energy levels of molecules, atoms, or subatomic particles as a frequency reference
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Mobile Radio Communication Systems (AREA)
- Computer Security & Cryptography (AREA)
Abstract
Reference signal generator, electronic equipment, moving body and data communication equipment.Fault omen can be detected before atomic oscillator complete failure.Reference signal generator has: receive the acceptance division of reference signal；Comprise the 1st agitator of atomic oscillator；1st phase comparator, compares from the signal of the 1st agitator output and the phase place of reference signal；2nd agitator, generates the signal to outside output；And the 2nd phase comparator, signal from the 1st agitator output and the phase place from the signal of the 2nd agitator output are compared, 1st agitator has output and the scanning result output unit performing a scan scanning result signal corresponding to the resonance signal obtained in the 1st agitator, and reference signal generator has at least one in the comparison of signal phase of the comparison of signal phase according to the 1st phase comparator and the 2nd phase comparator and scanning result signal carrys out the judging part of failure judgement state.
Description
Technical field
The present invention relates to reference signal generator, electronic equipment, moving body, data communication equipment and ground digital logical
Letter net.
Background technology
As GLONASS (the GNSS:Global Navigation Satellite that make use of artificial satellite
One of System) GPS (Global Positioning System, global positioning system) is the most well-known.GPS
The gps satellite used is mounted with the atomic clock that precision is high, sends the superposition track of gps satellite earthward
The satellite-signal of information and/or accurately time information etc..From the satellite-signal of gps satellite transmission by gps receiver
Receive.Further, gps receiver, according to being superimposed on orbit information and/or the time information of satellite-signal, calculates
The current location of gps receiver and/or the process of time information and/or generate with universal time (UTC:
Coordinated Universal Time) process etc. of timing signal accurately (1PPS) that synchronizes.
It is said that in general, such gps receiver is provided with the (position, generally location providing position/moment according to location Calculation
Put estimation) pattern and position based on the fixed position under known location the position fixed model in moment is provided.
In usual station-keeping mode, need from specified quantity (if minimum 3 of two-dimensional localization, if three
Dimension location is then 4) more than the satellite-signal of gps satellite.Further, it is possible to the GPS receiving satellite-signal defends
The quantity of star is the most, and the precision of location Calculation is the highest.
Further, in the fixed model of position, if setting the positional information of gps receiver, as long as then can connect
Receive the satellite-signal from least one gps satellite and just can generate 1PPS.
Here, in received terrestrial digital broadcasting, use the reference signal with described gps receiver and atomic oscillator
Generator.Received terrestrial digital broadcasting is public broadcasting, does not the most allow the interruption that the fault of atomic oscillator causes.Cause
This, be usually prepared for two stage fiducial signal generation devices, uses a side therein, in the case of it breaks down, cuts
It is changed to the opposing party.
It addition, Patent Document 1 discloses, there is gps receiver, atomic oscillator, quartz oscillator and PLL
(Phase Locked Loop, phaselocked loop) also exports the reference frequency generator device of 1PPS.Produce in this reference frequency
Device is configured to, first by atomic oscillator, in the case of atomic oscillator there occurs fault, switches to stone
English agitator.
Patent documentation 1: Japanese Unexamined Patent Publication 2011-155367 publication
Summary of the invention
But, in the device that patent documentation 1 is recorded, it is after atomic oscillator breaks down, switch to quartz oscillation
Device, therefore, it is difficult to use under the strict purposes of the such requirement of received terrestrial digital broadcasting.
It is an object of the invention to provide a kind of base that can detect fault omen before atomic oscillator complete failure
Calibration signal generator, electronic equipment, moving body, data communication equipment and terrestrial digital communication net.
The present invention is in order to solve at least some of of above-mentioned problem and to propose, it is possible to as following form or application
Example and realize.
[application examples 1]
The reference signal generator of the present invention is characterised by, this reference signal generator has: acceptance division, its
Receive reference signal；Comprise the 1st agitator of atomic oscillator；1st phase comparator, it is to from the described 1st
The signal of agitator output and the phase place of described reference signal compare；2nd agitator, it generates and exports to outside
Signal；And the 2nd phase comparator, it is to the signal from described 1st agitator output with from described 2nd vibration
The phase place of the signal of device output compares, and described 1st agitator has scanning result output unit, and this scanning result is defeated
Go out portion's output and perform a scan, with in described 1st agitator, the scanning result signal that the resonance signal obtained is corresponding,
This reference signal generator has judging part, and this judging part is according to the comparison of signal phase of described 1st phase comparator
With at least one in the comparison of signal phase of described 2nd phase comparator and described scanning result signal, it is judged that
Malfunction.
Thereby, it is possible to examined out of order omen before atomic oscillator complete failure and can tackle.
[application examples 2]
In the reference signal generator of the present invention, the most described acceptance division is to receive to send from positional information satellite
The receptor of satellite-signal.
Thereby, it is possible to the high reference signal of outside output frequency precision.
[application examples 3]
In the reference signal generator of the present invention, the most described judging part has failed storage portion, this failed storage
The described malfunction that portion's storage is corresponding with described comparison of signal phase and described scanning result signal.
Thereby, it is possible to knew the probability of fault before atomic oscillator complete failure.Thereby, it is possible to shake at atom
Examine out of order omen before swinging device complete failure and can tackle.
[application examples 4]
In the reference signal generator of the present invention, the most described judging part has the multiple described scanning results of storage
Scanning result storage part, utilizes the variable quantity of described scanning result in the judgement of described malfunction.
Thereby, it is possible to judge the malfunction of atomic oscillator rightly.
[application examples 5]
In the reference signal generator of the present invention, the most described judging part is according to the phase of described 1st phase comparator
Bit comparison signal, the comparison of signal phase of described 2nd phase comparator and described scanning result signal, it is judged that described event
Barrier state.
Thereby, it is possible to the malfunction of judgment standard signal generation device rightly.
[application examples 6]
In the reference signal generator of the present invention, preferably this reference signal generator has information output part, should
Information output part comprises the signal of the information of regulation according to the judged result of described judging part, output.
Thereby, it is possible to knew the probability of fault before atomic oscillator complete failure.Thereby, it is possible to shake at atom
Examine out of order omen before swinging device complete failure and can tackle.
[application examples 7]
The electronic equipment of the present invention is characterized by the reference signal generator of the present invention.
Thereby, it is possible to examined out of order omen before atomic oscillator complete failure and can tackle.
[application examples 8]
The moving body of the present invention is characterized by the reference signal generator of the present invention.
Thereby, it is possible to examined out of order omen before atomic oscillator complete failure and can tackle.
[application examples 9]
The data communication equipment of the present invention is characterized by the reference signal generator of the present invention.
Thereby, it is possible to examined out of order omen before atomic oscillator complete failure and can tackle.
[application examples 10]
The terrestrial digital communication net of the present invention is characterized by the reference signal generator of the present invention.
Thereby, it is possible to examined out of order omen before atomic oscillator complete failure and can tackle.
Accompanying drawing explanation
Fig. 1 is the figure of the schematic configuration of the embodiment of the reference signal generator illustrating the present invention.
Fig. 2 is the figure of the structure illustrating the navigation message from gps satellite transmission.
Fig. 3 is the block diagram of the structure example of the gps receiver illustrating that the reference signal generator shown in Fig. 1 had.
Fig. 4 is the block diagram of the structure example of the atomic oscillator illustrating that the reference signal generator shown in Fig. 1 had.
Fig. 5 is the figure of the table illustrating the action for the reference signal generator shown in explanatory diagram 1.
Fig. 6 is the figure of the table illustrating the action for the reference signal generator shown in explanatory diagram 1.
Fig. 7 is the block diagram of the embodiment of the electronic equipment illustrating the present invention.
Fig. 8 is the figure of the embodiment of the moving body illustrating the present invention.
Fig. 9 is the block diagram of the embodiment of the data communication equipment illustrating the present invention.
Figure 10 is the figure of the embodiment of the terrestrial digital communication net illustrating the present invention.
Label declaration
1: reference signal generator；2:GPS satellite；10:GPS receptor；11:SAW wave filter；12:
RF process portion；13: baseband processing section；14:TCXO；20: process portion；21: phase comparator；22: ring
Path filter；23:DSP；24: frequency divider；25:GPS control portion；26: phase comparator；27: loop is filtered
Ripple device；28: frequency divider；30: atomic oscillator；31: light source；32: air chamber；33: photodiode；34:
Detecting circuit；35: quartz oscillator；36: phase circuit；37:PLL；38: agitator；40: temperature sensing
Device；50:GPS antenna；60: quartz oscillator；71: second harmonic level detection portion；72: judging part；73:
Failed storage portion；74: scanning result storage part；75: information output part；121:PLL；122:LNA；123:
Frequency mixer；124:IF amplifier；125:IF wave filter；126:ADC；131:DSP；132:CPU；133:
SRAM；134:RTC；300: electronic equipment；310: reference signal generator；320:CPU；330:
Operating portion；340:ROM；350:RAM；360: communication unit；370: display part；400: moving body；410:
Reference signal generator；420: on-vehicle navigation apparatus；430: controller；440: controller；450: controller；
460: battery；470: reserve battery；500: data communication equipment；510: reference signal generator；520:
Control device；530: operating portion；540: storage part；550: communication unit；560: display part；600: ground number
Word communication network；610: reference signal generator；620: control device；630: communicator；640: stand；650:
Transmission path.
Detailed description of the invention
Below, with reference to the accompanying drawings shown in embodiment, to the reference signal generator of the present invention, electronic equipment, shifting
Kinetoplast, data communication equipment and terrestrial digital communication net specifically illustrate.
1. reference signal generator
Fig. 1 is the figure of the schematic configuration of the embodiment of the reference signal generator illustrating the present invention.Fig. 2 is to illustrate
Figure from the structure of the navigation message of gps satellite transmission.Fig. 3 is to illustrate the reference signal generator shown in Fig. 1
The block diagram of the structure example of the gps receiver being had.Fig. 4 is to illustrate the reference signal generator institute shown in Fig. 1
The block diagram of the structure example of the atomic oscillator having.Fig. 5 and Fig. 6 is to illustrate for the benchmark shown in explanatory diagram 1 respectively
The figure of the table of the action of signal generation device.
Reference signal generator 1 shown in Fig. 1 has: as the GPS of satellite signal receiving portion (acceptance division)
Receptor (receptor) 10, as satellite signal receiving control the process portion (CPU) 20 of device, atomic oscillator
(the 1st agitator) 30, temperature sensor 40, quartz oscillator (the 2nd agitator) 60, the inspection of second harmonic level
Survey portion 71, judging part 72, information output part 75 and gps antenna 50.
Additionally, about reference signal generator 1, part or all of structural element can be to divide in physical significance
From, it is also possible to it is one.Such as, gps receiver 10 and process portion 20 can be come by independent IC respectively
Realizing, gps receiver 10 and process portion 20 can also realize as the IC of single-chip.Other parts are too.
This reference signal generator 1 receives and sends from the gps satellite (aeronautical satellite) 2 as positional information satellite
Signal, generate high-precision 1PPS.
Cincture on the regulation track that gps satellite 2 is empty on earth, is sent in the 1.57542GHz as carrier wave earthward
Electric wave (L1 ripple) upper superposition navigation message and C/A code (Coarse/Acquisition Code, thick/catch code)
The satellite-signal (gps signal) of (being modulated obtaining to carrier wave).Additionally, above-mentioned satellite-signal is to input from outside
One example of the reference signal of reference signal generator 1.
C/A code, for identifying when precontract exists the satellite-signal of 30 gps satellites 2, is by each chip (chip)
The intrinsic pattern (pattern) constituted for 1023 chips (1ms cycle) of any one party in+1 or-1.
Therefore, relevant by take between satellite-signal to the pattern of each C/A code, it is possible to detection is superimposed upon on satellite-signal
C/A code.
The satellite-signal (specifically navigation message) that each gps satellite 2 sends includes each GPS of expression defend
The orbit information of star 2 position in orbit.Further, each gps satellite 2 is equipped with atomic clock, believes at satellite
The time information of clock like precision by atomic clock timing is comprised in number.Therefore, by receiving from more than 4
The satellite-signal of gps satellite 2, utilizes the orbit information comprised in each satellite-signal and time information to carry out location meter
Calculate, it is possible to position and the accurate information in moment obtaining receiving point (setting place of gps antenna 50).Tool
For body, by set up three-dimensional position to receive point (x, y, z) and moment t is 4 yuan of equations of 4 variablees
Formula, obtains its solution.
Additionally, in the case of receiving known to the position of point, it is possible to by receiving from more than one gps satellite 2
Satellite-signal, utilize be included in each satellite-signal time information obtain receive point time information.
Further, the orbit information comprised in each satellite-signal is used, it is possible to obtain moment of each gps satellite 2 and connect
The information of the difference in the moment of sink.Additionally, by the control part on ground, measure what each gps satellite 2 was carried
The moment error slightly of atomic clock, also comprises the time correction ginseng for correcting this moment error in satellite-signal
Number, receives the moment of point, it is possible to obtain the time information of clock like precision by utilizing this time correction parameter to correct.
As shown in (A) of Fig. 2, navigation message is configured to using prime frame that whole bit numbers are 1500 bits as 1
The data of individual unit.Prime frame is divided into 5 subframes 1～5 of each 300 bits.From each gps satellite 2 with 6 seconds
Send the data of 1 subframe.Therefore, from each gps satellite 2 within 30 seconds, to send the data of a prime frame.
Subframe 1 includes the satellite correction datas such as week numbering data (WN:week number).All numbering data
It is the information in the week in the moment representing and including gps satellite 2.The starting point in the moment of gps satellite 2 is UTC (generation
Boundary's standard time) 00:00:00 in 6 days January in 1980, from this day start week week numbered 0.Week compiles
Number is that unit is updated by each week.
Subframe 2,3 includes ephemeris parameter (the detailed orbit information of each gps satellite 2).Further, subframe 4,
Almanac parameters (the outline orbit informations of whole gps satellites 2) is included in 5.
Further, in each beginning of subframe 1～5, TLM (Telemetry (remote measurement)) word and HOW are included
Word, wherein, this TLM word stores TLM (Telemetry word, the remote measurement word) data of 30 bits, should
HOW word stores HOW (hand over word (the hand-over word)) data of 30 bits.
Therefore, TLM word and HOW word are sent, on the other hand, according to 30 from gps satellite 2 according to 6 seconds intervals
Second interval sends satellite correction data, ephemeris parameter and the almanac parameters such as week numbering data.
As shown in (B) of Fig. 2, TLM word includes preamble data, TLM message, Reserved (reservation)
Bit, parity data.
As shown in (C) of Fig. 2, include in HOW word and be referred to as TOW (Time of Week be (week
Time), hereinafter also referred to " Z-count ") time information.Z-count data represented from Sunday weekly with the second
In 0 elapsed time lighted, during 0 of Sunday in next week, return to 0.That is, Z-count data are the starting points from week
Rise according to the information in seconds represented weekly, become the numeral representing the elapsed time in units of 1.5 seconds.?
This, Z-count data represent the time information of the beginning bit sending next sub-frame data.Such as, the Z of subframe 1
Enumeration data represents the time information of the beginning bit sending subframe 2.Further, HOW word also includes expression
The data (ID code) of 3 bits of the ID of frame.That is, as shown in (A) of Fig. 2, at the HOW of subframe 1～5
Word comprises the ID code of " 001 ", " 010 ", " 011 ", " 100 ", " 101 " respectively.
By obtaining HOW word (the Z-count number comprised in all numbering data and subframe 1～5 comprised in subframe 1
According to), it is possible to calculate the moment of gps satellite 2.If additionally, obtain before week numbering data and in inside to from
The elapsed time that the period of all numbering data of acquirement rises is counted, then also be able to without acquirement week numbering data every time
Obtain the current week numbering data of gps satellite 2.Therefore, as long as only obtaining Z-count data, it becomes possible to pass through
Budgetary estimate and know the current time of gps satellite 2.
Satellite-signal as described above is connect by gps receiver 10 through gps antenna 50 as shown in Figure 1
Receive.
Gps antenna 50 is the antenna receiving the various electric waves comprising satellite-signal, with gps receiver 10 even
Connect.
Gps receiver 10 carries out various process according to the satellite-signal received via gps antenna 50.
Specifically, gps receiver 10 has usual station-keeping mode (the 1st pattern) and position fixed model (
2 patterns), it is set according to the control instruction (pattern setting control instruction) from process portion (CPU) 20
For any one in usual station-keeping mode and position fixed model.
Gps receiver 10 plays a role as " location Calculation portion " under usual station-keeping mode, receives from multiple (excellent
Elect more than 4 as) gps satellite 2 send satellite-signal, according to the rail comprised in the satellite-signal received
Road information (specifically, above-mentioned ephemeris parameter and/or almanac parameters etc.) and time information are (on specifically,
Week numbering data and/or the Z-count data etc. stated) carry out location Calculation.Further, gps receiver 10 generates following
1PPS.
Further, gps receiver 10 plays a role as " timing signal generating unit " under the fixed model of position, connects
Receive the satellite-signal sent from least one gps satellite 2, according to the track letter comprised in the satellite-signal received
Breath, time information and the set positional information receiving point, and generation 1PPS (1Pulse Per Second, every 1
1 pulse of second).1PPS (example of the timing signal Tong Bu with reference instant) is and UTC (universal time)
The pulse signal of Complete Synchronization, comprises 1 pulse in every 1 second.So, gps receiver 10 is in the life of timing signal
The satellite-signal used in one-tenth comprises orbit information and time information, it is possible to generation the most synchronize with reference instant
Timing signal.Additionally, above-mentioned 1PPS is an example of reference signal.
Below, the structure of gps receiver 10 is described in detail.
Gps receiver 10 shown in Fig. 3 has: SAW (Surface Acoustic Wave: surface acoustic wave) filters
Ripple device 11, RF process portion 12, baseband processing section 13 and temperature compensating type quartz oscillator (TCXO:Temperature
Compensated Crystal Oscillator)14。
SAW filter 11 carries out extracting the process of satellite-signal from the electric wave that gps antenna 50 receives.This SAW
Wave filter 11 is configured to the band filter making the signal of 1.5GHz wave band pass through.
RF process portion 12 has PLL (Phase Locked Loop, phaselocked loop) 121, LNA (Low Noise
Amplifier, low-noise amplifier) 122, frequency mixer 123, IF amplifier 124, IF (Intermediate Frequency:
Intermediate frequency) wave filter 125 and ADC (A/D converter) 126.
PLL 121 generates the oscillator signal frequency multiplication of the TCXO 14 with tens MHz degree vibrations to 1.5GHz frequency
The clock signal of the frequency of band.
The satellite-signal utilizing LNA 122 to extract SAW filter 11 is amplified.Amplified by LNA 122
After the satellite-signal clock signal that utilizes frequency mixer 123 and PLL 121 to export be mixed, down-convert as centre
The signal (IF signal) of frequency band (such as, several MHz).Signal after being mixed by frequency mixer 123 is by IF amplifier
124 amplify.
By the mixing in frequency mixer 123, the most also generating GHz level high-frequency signal with IF signal, therefore IF is put
This high-frequency signal is the most also amplified by big device 124 with IF signal.IF wave filter 125 makes IF signal pass through, and
Remove this high-frequency signal (precisely making it decay to below specified level).By the IF after IF wave filter 125
Signal is converted to digital signal by ADC (A/D converter) 126.
Baseband processing section 13 has DSP (Digital Signal Processor, digital signal processor) 131, CPU
(Central Processing Unit, CPU) 132, SRAM (Static Random Access Memory,
Static RAM) 133 and RTC (real-time clocks) 134, using the oscillator signal of TCXO 14 as time
Clock signal carries out various process.
DSP 131 and CPU 132, while cooperation, is demodulated baseband signal by IF signal, obtains navigation message
In the orbit information that comprises and/or time information, carry out the fixed mode process of process or position of usual station-keeping mode.
SRAM 133 is for storing acquired time information and/or orbit information, control instruction (position according to regulation
Install fixed control instruction) set receive the elevation mask used in the positional information of point, position fixed model etc.
(elevation angle mask) etc..RTC 134 generates the timing for carrying out Base-Band Processing.This RTC 134 passes through
Clock signal from TCXO 14 counts up.
Specifically, baseband processing section 13 produces the local code with each C/A code same form, carries out taking baseband signal
In the process (satellite acquisition) relevant to local code of each C/A code of comprising.Further, baseband processing section 13 adjusts
The generation timing of local code so that the correlation about each local code becomes peak value, becomes more than threshold value at correlation
In the case of, it is judged that for being (to have captured gps satellite with using this local code as the gps satellite 2 of C/A code is synchronize
2) code.Additionally, GPS uses CDMA (Code Division Multiple Access, CDMA) mode,
In this mode, whole gps satellites 2 utilize different C/A codes to send the satellite-signal of same frequency.Therefore,
By the C/A code comprised in the satellite-signal that differentiation receives, it is possible to retrieve seizable gps satellite 2.
It addition, for the orbit information and/or the time information that obtain the gps satellite 2 captured, baseband processing section 13
Carry out the process that the local code and baseband signal with the same form of C/A code of this gps satellite 2 is mixed.?
In signal after mixing, comprise the orbit information of gps satellite 2 captured and/or the navigation of time information disappears
Cease demodulated.Then, baseband processing section 13 carries out obtaining the orbit information comprised in navigation message and/or time information,
And it is stored in the process in SRAM 133.
Further, baseband processing section 13 receives the control instruction (specifically pattern setting control instruction) of regulation,
It is set as any one in usual station-keeping mode and position fixed model.Baseband processing section 13 is at usual station-keeping mode
Under, utilize the orbit information of the gps satellite 2 of more than 4 be stored in SRAM 133 and time information to carry out
Location Calculation.
Further, baseband processing section 13, under the fixed model of position, utilizes more than 1 be stored in SRAM 133
The orbit information of gps satellite 2 and the positional information receiving point that is stored in SRAM 133, export high-precision
The 1PPS of degree.Specifically, baseband processing section 13 has each pulse to 1PPS in a part of RTC 134
The timing that produces carry out the 1PPS enumerator that counts, the orbit information utilizing gps satellite 2 and the position letter receiving point
Breath, calculates the satellite-signal sent from gps satellite 2 and arrives the propagation delay time received needed for point, according to this biography
Broadcast time delay, the setting value of 1PPS enumerator is changed to optimum.
Further, baseband processing section 13, under usual station-keeping mode, is believed according to the moment receiving point that location Calculation obtains
Breath output 1PPS.
In addition can also be, under the fixed model of position, if it is possible to catch multiple gps satellite 2 and then position
Calculate.
Further, baseband processing section 13 output comprise the positional information as location Calculation result and/or time information, with
And the NMEA data of the various information such as the situation of reception (gps satellite 2 catch number, the intensity etc. of satellite-signal).
The action of the gps receiver 10 constituted as described above process portion (CPU) 20 as shown in Figure 1
It is controlled.
Process portion 20 sends various control instruction to control the action of gps receiver 10 to gps receiver 10,
And receive 1PPS and/or the NMEA data of gps receiver 10 output to carry out various process.Additionally, process
Portion 20 such as can also carry out various process according to the program being stored in arbitrary memorizer.
This process portion 20 has: phase comparator (the 1st phase comparator) 21, loop filter 22, DSP (Digital
Signal Processor, digital signal processor) 23, frequency divider 24, GPS control portion (receiving control portion) 25,
Phase comparator (the 2nd phase comparator) 26, loop filter 27 and frequency divider 28.Additionally, DSP 23 He
GPS control portion 25 can also be made up of parts.
DSP 23 is handled as follows: periodically (such as, every 1 second) obtains NMEA number from gps receiver 10
According to, collect the positional information (the gps receiver 10 location meter under usual station-keeping mode comprised in NMEA data
Calculate result), generate the statistical information in the stipulated time, generate the positional information receiving point according to this statistical information.Especially
It is, according to the representative value of the gps receiver 10 multiple location Calculation results under usual station-keeping mode (such as,
Meansigma methods, mode or intermediate value), generate the positional information receiving point.
GPS control portion 25 sends various control instruction to gps receiver 10, controls the dynamic of gps receiver 10
Make.Specifically, GPS control portion 25 to gps receiver 10 transmission pattern sets control instruction, carry out by
Gps receiver 10 switches to the fixed mode process in position from usual station-keeping mode.Further, GPS control portion 25
By gps receiver 10 before usual station-keeping mode is switched to position fixed model, to gps receiver 10
Send position setting control instruction, carry out that gps receiver 10 is set DSP 23 generation and receive position letter a little
The process of breath.
The clock signal (frequency: f) that atomic oscillator 30 is exported by frequency divider 24 carries out f frequency dividing, exports 1Hz
Sub-frequency clock signal.
During the frequency dividing of the 1Hz of the 1PPS that gps receiver 10 is exported by phase comparator 21 and frequency divider 24 output
Clock signal carries out phase bit comparison.Phase signal i.e. comparison of signal phase as the comparative result of phase comparator 21
It is transfused to loop filter 22, in loop filter 22, according to comparison of signal phase, generates atomic oscillator 30
The control voltage letter of the quartz oscillator 35 (with reference to Fig. 4) as voltage controlled oscillator described later (VCO) being had
Number (control voltage), and export this control voltage signal to quartz oscillator 35.The parameter of loop filter 22 by
DSP 23 sets.
The 1PPS that the sub-frequency clock signal of the 1Hz that frequency divider 24 is exported exports with gps receiver 10 is Tong Bu,
This sub-frequency clock signal exports to phase comparator 26 as the high 1PPS of the frequency accuracy Tong Bu with UTC.
That is, quartz oscillator 35 is configured to the output voltage according to loop filter 22 and i.e. controls voltage signal
Adjust frequency, as mentioned earlier, by phase comparator 21, loop filter 22, DSP 23 and frequency divider
24, the 1PPS Complete Synchronization that the clock signal that quartz oscillator 35 is exported and gps receiver 10 are exported.This
Outward, based on phase comparator 21, loop filter 22, DSP 23 and the structure of frequency divider 24, shake as making quartz
" the Synchronization Control portion " of swinging clock signal that device 35 (atomic oscillator 30) exported Tong Bu with 1PPS plays a role.
Further, the comparison of signal phase of phase comparator 21 is transfused to judging part 72, in judging part 72, is used for
The judgement of malfunction described later.
Atomic oscillator 30 is the energy jump that make use of atom, it is possible to shaking of the clock signal that output frequency precision is high
Swing device, such as, the widely known atomic oscillator that make use of rubidium atom and/or Cs atom.As atomic oscillator 30,
EIT (Electromagnetically Induced Transparency, electromagnetic induced transparency) is make use of for instance, it is possible to use
The atom of phenomenon (also referred to as CPT (Coherent Population Trapping, Coherent Population Trapping is imprisoned) phenomenon) shakes
Swing device or make use of the atomic oscillator etc. of optical microwave double resonance phenomenon.About atomic oscillator 30, will be
Hereinafter illustrate.
The clock signal (frequency: f) that quartz oscillator 60 is exported by frequency divider 28 carries out f frequency dividing, exports 1Hz
Sub-frequency clock signal.
The sub-frequency clock signal of the 1Hz that frequency divider 24 is exported and frequency divider 28 are exported by phase comparator 26
The sub-frequency clock signal of 1Hz carries out phase bit comparison.Phase signal as the comparative result of phase comparator 26 is
Comparison of signal phase is transfused to loop filter 27, in loop filter 27, according to comparison of signal phase, generates
As the control voltage signal (control voltage) of the quartz oscillator 60 of voltage controlled oscillator (VCO), to quartz oscillation
Device 60 exports this control voltage signal.The parameter of loop filter 27 is set by DSP 23.
The frequency-dividing clock of the 1Hz that the sub-frequency clock signal of the 1Hz that frequency divider 28 is exported and frequency divider 24 are exported
Signal, the 1PPS that i.e. gps receiver 10 is exported synchronize, and this frequency-dividing clock is believed by reference signal generator 1
Number export to outside as the high 1PPS (reference signal) of the frequency accuracy Tong Bu with UTC.
That is, quartz oscillator 60 is configured to the output voltage according to loop filter 27 and i.e. controls voltage signal
Adjust frequency, as mentioned earlier, by phase comparator 26, loop filter 27, DSP 23 and frequency divider
28, the 1PPS Complete Synchronization that the clock signal that quartz oscillator 60 is exported and gps receiver 10 are exported.This
Outward, the structure being made up of phase comparator 26, loop filter 27, DSP 23 and frequency divider 28 is as making quartz
Clock signal that agitator 60 is exported " the Synchronization Control portion " Tong Bu with 1PPS plays a role.
Further, the comparison of signal phase of phase comparator 26 is transfused to judging part 72, in judging part 72, is used for
The judgement of malfunction described later.
As quartz oscillator 60, it is not particularly limited, for example, it is possible to list constant temperature grooved quartz oscillator
(OCXO), temperature compensating type quartz oscillator (TCXO) etc..It addition, in the present embodiment, quartz is used
Agitator 60 is as the 2nd agitator, but is not limited to this, such as, can also be, uses atomic oscillator etc. to make
It it is the 2nd agitator.
Further, near atomic oscillator 30 and quartz oscillator 60, temperature sensor 40, DSP 23 it are configured with
The quartz oscillator 35 atomic oscillator 30 being had according to the detected value (detection temperature) of temperature sensor 40
It is adjusted with the control voltage signal of quartz oscillator 60, the most also carries out the frequency to quartz oscillator 35 and 60
Rate temperature characterisitic carries out the process of temperature-compensating (temperature correction).
Additionally, occurring gps receiver 10 cannot receive the situations such as satellite-signal (fault keeps (hold-over))
Time, the precision deterioration of the 1PPS that gps receiver 10 is exported or gps receiver 10 stop output 1PPS.
In this case, process portion 20 can also stop clock signal and the GPS making atomic oscillator 30 be exported
The process that the 1PPS that receptor 10 is exported synchronizes, and make atomic oscillator 30 vibrate voluntarily.So, though
In the case of the precision deterioration of the 1PPS that gps receiver 10 is exported, reference signal generator 1 also is able to defeated
Go out the 1PPS that the frequency accuracy vibrated voluntarily based on atomic oscillator 30 is high.
It addition, the most every 1 second of reference signal generator 1 and 1PPS are to the up-to-date NMEA number of outside output
According to, and also the clock signal that frequency is f exported to outside output quartz oscillator 60.
Judging part 72 has the function of the malfunction of judgment standard signal generation device 1.This judging part 72 has event
Barrier storage part 73 and scanning result storage part 74.In failed storage portion 73, storage has reference signal described later to produce
The fault message etc. of device 1, and in scanning result storage part 74, storage has multiple scanning results described later etc..
Information output part 75 has the judged result according to judging part 72, and output comprises the signal (alarm of provisioning information
Deng) function.Above-mentioned signal is such as sent to the not shown terminal unit etc. being connected with information output part 75.
Second harmonic level detection portion 71 is transfused to the scanning result signal described later of atomic oscillator 30.Second harmonic
Level detection portion 71 has the function of the amplitude (level) detecting above-mentioned scanning result signal.Comprise this scanning result
The signal of the amplitude information of signal is transfused to judging part 72, for the judgement of malfunction described later in judging part 72.
Then, atomic oscillator 30 is illustrated.
As shown in Figure 4, atomic oscillator 30 has light source (light exit portion) 31, air chamber (gas cell) 32, light
Electric diode (light accepting part) 33, detecting circuit (scanning result output unit) 34, as voltage controlled oscillator (VCO)
Quartz oscillator (voltage-controlled quartz oscillator: VCXO) 35, phase circuit 36, PLL 37 and agitator 38.
As light source 31, such as, can use semiconductor laser etc..
Further, in air chamber 32, the alkali metal such as the most gasiform rubidium, caesium, sodium it are sealed with.
Further, photodiode 33 receives the light after light source 31 penetrates and pass through air chamber 32, carries out opto-electronic conversion,
The output signal of telecommunication.
Further, it is not particularly limited as quartz oscillator 35, for example, it is possible to list constant temperature grooved quartz oscillation
Device (OCXO), temperature compensating type quartz oscillator (TCXO) etc..
Further, detecting circuit 34 has output and performs a scan the resonance signal obtained in atomic oscillator 30
The function of the scanning result signal of (EIT signal) corresponding (quite).
Below the scanning result signal generated by atomic oscillator 30 is illustrated, for ease of understanding, as one
Example, uses concrete numerical value to illustrate the frequency etc. of each signal.
First, in air chamber 32, enclose gasiform rubidium (frequencies omega 0 producing atomic resonance is 9.2GHz), if
The signal of 111Hz is exported for agitator 38.
Modulate in frequency 111Hz by phase circuit 36 from the signal (frequency: f) of quartz oscillator 35 output,
And by PLL 37 frequency multiplication to 4.6 × 105Again (frequency: 4.6GHz), export to light source 31.
So, when utilizing the signal that frequency is 111Hz to perform a scan, timing according to the rules in air chamber 32
Produce atomic resonance, i.e. electromagnetic induced transparency (EIT:Electromagnetically Induced Transparency) existing
As, and produce the steeper signal i.e. atomic resonance signal (EIT signal) produced with this EIT phenomenon.
In the case of not producing above-mentioned atomic resonance, from photodiode 33 to detecting circuit 34 incoming frequency it is
The signal of 111Hz.
But, when producing above-mentioned atomic resonance, from photodiode 33 to detecting circuit 34 not incoming frequency it is
The signal of 111Hz, and the signal that incoming frequency is 222Hz (i.e. the second harmonic of 111Hz).This creates atom
Frequency in the case of resonance be the signal of 222Hz be scanning result signal, scanning result signal is from detecting circuit 34
Export to second harmonic level detection portion 71.
Additionally, detecting circuit 34 is controlled so that the frequency inputting detecting circuit 34 from photodiode 33 is
The amplitude of the signal of 111Hz is 0, i.e., make from photodiode 33 to detecting circuit 34 incoming frequency be no longer
The signal of 111Hz.
In this reference signal generator 1, it is configured to the atomic oscillator at reference signal generator 1
Out of order omen is examined before 30 complete failures (wear-out failure).Below this structure is illustrated.
First, the reason as the wear-out failure of atomic oscillator 30 mainly has two.They are the aging of light source 31
With the alkali-metal minimizing in air chamber 32, dimmed.This wear-out failure is not instantaneous generation, but fault is in time
Pass through and develop, at complete failure final after specified time limit.
On the other hand, when the wear-out failure of atomic oscillator 30 starts, scanning result signal described later is (in this reality
Execute in mode as the signal of 222Hz) amplitude reduce.The resonance letter of this scanning result signal and atomic oscillator 30
Number (EIT signal) is corresponding.That is, the resonance signal amplitude of the amplitude of scanning result signal and atomic oscillator 30
Increase and decrease increases and decreases accordingly.
In reference signal generator 1, it is judged that portion 72 is according to scanning result signal, the phase place of phase comparator 21
Comparison signal and the comparison of signal phase of phase comparator 26, it is judged that the malfunction of reference signal generator 1.
That is, it is judged that first portion 72 calculates wear-out failure level variation rate A represented by following formula (1).
A=[{ (amplitude of preliminary sweep consequential signal)-(amplitude of Current Scan consequential signal) }/(initially sweep
Retouch the amplitude of consequential signal)] × 100 (1)
Further, in the case of this wear-out failure level variation rate A is more than threshold value B, it is set to "abnormal", little
In the case of threshold value B, it is set to " normally ".
Above-mentioned threshold value B is not particularly limited, and suitably can set according to various conditions, in the present embodiment, such as
It is set as 1%.Therefore, wear-out failure level variation rate A is "abnormal" in the case of for more than 1%, is being less than
In the case of 1% it is " normally ".
Additionally, the amplitude of the amplitude of above-mentioned preliminary sweep consequential signal and above-mentioned Current Scan consequential signal is as scanning knot
Fruit is stored in scanning result storage part 74, and above-mentioned wear-out failure level variation rate A is as the rate of change of scanning result
It is stored in scanning result storage part 74.
And, it is judged that portion 72 is according to the comparison of signal phase of phase comparator 21, it is judged that normal/abnormal.Above-mentioned
In the case of phase contrast shown in comparison of signal phase is relatively big, it is judged that for gps receiver 10 side and atomic oscillator 30
There is exception at least one party in side.
In the present embodiment, it is more than threshold value a at the phase contrast shown in the comparison of signal phase of phase comparator 21
In the case of be set to "abnormal", in the case of less than threshold value a, be set to " normally ".
And, it is judged that portion 72 judges normal/abnormal according to the comparison of signal phase of phase comparator 26.In above-mentioned phase
In the case of phase contrast shown in bit comparison signal is relatively big, it is judged that for quartz oscillator 60 side and atomic oscillator 30
There is exception at least one party in side.
In the present embodiment, the phase contrast shown in the comparison of signal phase of phase comparator 26 is more than threshold value b
In the case of be set to "abnormal", in the case of less than threshold value b, be set to " normally ".
Above-mentioned threshold value a and b are all not specially limited, and can suitably set according to various conditions, be preferably set to 0.1 μ
The value in scope more than second and below 10 μ seconds, is more preferably set as the 0.2 μ second more than and below 5 μ seconds
In the range of value.Additionally, threshold value a can be identical with threshold value b, it is also possible to different.
As shown in Figure 5, it is judged that portion 72 is according to based on above-mentioned wear-out failure level variation rate A normal/abnormal
Judged result, the normal/abnormal judged result of comparison of signal phase based on above-mentioned phase comparator 21 and based on
The normal/abnormal judged result of the comparison of signal phase of above-mentioned phase comparator 26, it is judged that reference signal generator
The malfunction of 1, sets situation.Further, above-mentioned fault status information is stored in failed storage portion 73, and
The signal comprising above-mentioned fault status information is exported to outside from information output part 75.
It is "abnormal" in judged result based on wear-out failure level variation rate A, obtains based on phase comparator 21
The judged result of phase contrast be that " normally " and the judged result of phase contrast that obtains based on phase comparator 26 are for " just
In the case of often ", situation is set as " wear-out failure pattern ".The situation being somebody's turn to do " wear-out failure pattern " illustrates former
The situation that the wear-out failure of sub-agitator 30 has started to.
Further, judged result based on wear-out failure level variation rate A be "abnormal", based on phase comparator 21
The judged result of the phase contrast obtained is "abnormal" and the judged result of phase contrast obtained based on phase comparator 26
In the case of " normally ", situation is set as " reception of satellite-signal is the best ".Should " the reception of satellite-signal
The best " situation illustrate that the reception about satellite-signal creates bad situation.
Further, judged result based on wear-out failure level variation rate A be "abnormal", based on phase comparator 21
The judged result of the phase contrast obtained is " normally " and the judged result of phase contrast obtained based on phase comparator 26
In the case of "abnormal", situation is set as " fault ".The situation being somebody's turn to do " fault " illustrates that arbitrarily side creates
The situation of fault.
Further, judged result based on wear-out failure level variation rate A be "abnormal", based on phase comparator 21
The judged result of the phase contrast obtained is "abnormal" and the judged result of phase contrast obtained based on phase comparator 26
In the case of "abnormal", situation is set as " fault ".The situation being somebody's turn to do " fault " illustrates that arbitrarily side creates
The situation of fault.
Further, judged result based on wear-out failure level variation rate A be " normally ", based on phase comparator 21
The judged result of the phase contrast obtained is "abnormal" and the judged result of phase contrast obtained based on phase comparator 26
In the case of "abnormal", situation is set as " breaking down beyond atomic oscillator ".Should " atomic oscillator
Break down in addition " situation be shown in the situation creating fault beyond atomic oscillator 30.
Further, wear-out failure level variation rate A be " normally ", phase comparator 21 be " normally " and phase place
In the case of comparator 26 is " normally ", situation is set as " normally ".The situation being somebody's turn to do " normally " illustrates benchmark
The normal situation of signal generation device 1.
Further, in reference signal generator 1, it is judged that portion 72, according to wear-out failure level variation rate A, estimates
The life-span of atomic oscillator 30, it is predicted that atomic oscillator 30 complete failure (wear-out failure) till when.At this
In embodiment, as shown in Figure 6, situation is set according to wear-out failure level variation rate A.Further, about upper
The information in the life-span stating atomic oscillator 30 is stored in failed storage portion 73, and comprises and vibrate about above-mentioned atom
The signal of the life information of device 30 exports outside from information output part 75.
In the case of wear-out failure level variation rate A is 1%, it is estimated as atomic oscillator 30 within 3 months
Complete failure, and situation is set as " about complete failure within 3 months ".
Further, in the case of wear-out failure level variation rate A is 5%, it is estimated as atomic oscillator 30 at 1
Complete failure within Yue, and situation is set as " about complete failure within 1 month ".
Further, in the case of wear-out failure level variation rate A is 10%, it is estimated as atomic oscillator 30 at 1 star
Complete failure within phase, and situation is set as " about complete failure within 1 week ".
Further, in the case of wear-out failure level variation rate A is 20%, it is estimated as atomic oscillator 30 at 1 day
Within complete failure, and situation is set as " about complete failure within 1 day ".
Further, in the present embodiment, the threshold value of wear-out failure level variation rate A is such as set as 10%.?
In the case of Gai, when wear-out failure level variation rate A becomes below 10%, comprise above-mentioned " about within 1 week
Complete failure " the signal of information exported to outside from information output part 75.
One week was the period enough changing reference signal generator 1 during this, and thus, operating personnel can be
The replacing operation etc. of reference signal generator 1 is enough carried out comfortably on time.
As described above, in this reference signal generator 1, it is possible in atomic oscillator 30 event completely
Out of order omen is examined before barrier.Thereby, it is possible to tackled before atomic oscillator 30 complete failure.
In the present embodiment, comprise the signal of each information from information output part 75 output, therefore, it is possible to according to this letter
Breath implements the coping strategy of regulation.
As coping strategy, such as, can list, reference signal generator 1 is replaced by other normal base
Calibration signal generator 1 or atomic oscillator 30 is replaced by other normal atomic oscillator 30 etc..
Further, the structure 1 recorded below and structure 2 can be listed as other structure.
(structure 1)
It is configured to, prepares two stage fiducial signal generation devices 1 in advance, when detecting out of order omen, automatically switch
For normal reference signal generator 1.
(structure 2)
It is configured to, when detecting out of order omen, automatically switches to not shown quartz to shake from atomic oscillator 30
Swing device.
2. electronic equipment
Then, the embodiment of the electronic equipment of the present invention is illustrated.
Fig. 7 is the block diagram of the embodiment of the electronic equipment illustrating the present invention.
Electronic equipment 300 shown in Fig. 7 have reference signal generator 310, CPU (Central Processing Unit,
CPU) 320, operating portion 330, ROM (Read Only Memory, read only memory) 340, RAM
(Random Access Memory, random access memory) 350, communication unit 360 and display part 370.
As reference signal generator 310, apply above-mentioned reference signal generator 1.As previously described that
Sample, reference signal generator 310 receives satellite-signal, generates high-precision timing signal (1PPS) outwards
Portion exports.Thereby, it is possible to realize the electronic equipment 300 of high reliability with lower cost.
CPU 320, according to the program being stored in ROM 340 grade, carries out various calculating process and control processes.Tool
For body, timing signal (1PPS) that CPU 320 and reference signal generator 310 are exported or clock signal
Synchronously carry out the timing process various process corresponding with the operation signal from operating portion 330, in order to enter with outside
Row data communication and control communication unit 360 process, send for make display part 370 show various information display letter
Number process etc..
Operating portion 330 is the input equipment being made up of operated key and/or press button etc., the operation that will carry out with user
Corresponding operation signal exports to CPU 320.
ROM 340 stores CPU 320 for performing various calculating process and/or the program of control process and/or data etc..
RAM 350 is used as the working region of CPU 320, program that interim storage reads from ROM 340 and/or
Data, from operating portion 330 input data, CPU 320 according to various programs perform after operation result etc..
Communication unit 360 carries out the various controls for setting up the data communication between CPU 320 and external device (ED).
Display part 370 is the display device being made up of LCD (Liquid Crystal Display, liquid crystal display) etc.,
Display signal according to inputting from CPU 320 shows various information.Operation can also be provided as at display part 370
The touch pad that portion 330 plays a role.
Various electronic equipment can be considered as this electronic equipment 300, be not particularly limited, can list such as
Realize moment management server (time server) synchronization with the standard time, carry out the distribution etc. of timestamp
Time management device (time stamp server), base station equifrequent standard apparatus etc..
3. moving body
Then, the embodiment of the moving body of the present invention is illustrated.
Fig. 8 is the figure of the embodiment of the moving body illustrating the present invention.
Moving body 400 shown in Fig. 8 be configured to comprise reference signal generator 410, on-vehicle navigation apparatus 420,
Controller 430,440,450, battery 460 and reserve battery 470.
As reference signal generator 410, apply above-mentioned reference signal generator 1.Reference signal produces dress
Put 410 such as in the movement of moving body 400, under usual station-keeping mode, carry out location Calculation in real time, output 1PPS,
Clock signal and NMEA data.Further, reference signal generator 410 is such as in the stopping of moving body 400
Cheng Zhong, after carrying out multiple bearing calculating under usual station-keeping mode, by mode or the intermediate value of multiple bearing result of calculation
It is set as current positional information, under the fixed model of position, exports 1PPS, clock signal and NMEA data.
The 1PPS of on-vehicle navigation apparatus 420 and reference signal generator 410 output or clock signal synchronization ground, profit
By the NMEA data of reference signal generator 410 output, in display display position and/or moment or other are each
The information of kind.
Controller 430,440,450 carries out automotive engine system, brakes, intelligence keyless entry (Keyless Entry)
The various controls of system etc..Controller 430,440,450 can be with the clock of reference signal generator 410 output
Signal synchronously carries out various control.
The moving body 400 of present embodiment has reference signal generator 410, thus in mobile neutralization stops all
Can ensure that higher reliability.
Various moving body can be considered, for example, it is possible to list automobile (also to comprise electricity as such moving body 400
Electrical automobile), jet plane, aircraft, boats and ships, rocket, the artificial satellite etc. such as helicopter.
4. data communication equipment
Then, the embodiment of the data communication equipment of the present invention is illustrated.
Fig. 9 is the block diagram of the embodiment of the data communication equipment illustrating the present invention.
Data communication equipment 500 shown in Fig. 9 has: reference signal generator 510, be provided with CPU (Central
Processing Unit, CPU) etc. control device 520, operating portion 530, be provided with ROM (Read Only
Memory, read only memory) and the depositing of RAM (Random Access Memory, random access memory) etc.
Storage portion 540, communication unit 550 and display part 560.
As reference signal generator 510, apply above-mentioned reference signal generator 1.As previously described that
Sample, reference signal generator 510 receives satellite-signal, generates high-precision timing signal (1PPS), to outside
Output.Thereby, it is possible to realize the data communication equipment 500 of high reliability with lower cost.
The purposes of this data communication equipment 500 is not specially limited, data communication equipment 500 such as with communication network
Connect and the station carrying out received terrestrial digital broadcasting etc. etc. is used.
5. terrestrial digital communication net
Then, the embodiment of the terrestrial digital communication net of the present invention is illustrated.
Figure 10 is the figure of the embodiment of the terrestrial digital communication net illustrating the present invention.
Terrestrial digital communication net 600 shown in Figure 10 is the communication network connecting multiple stations 640, and this station 640 is provided with
Reference signal generator 610, it is provided with the control of CPU (Central Processing Unit, central processing unit) etc.
Device 620 and communicator 630 etc., multiple stations 640 are sequentially connected with via transmission path 650.Each station 640
It is the station such as carrying out received terrestrial digital broadcasting etc. respectively.Further, the communication mode between each station 640 is not specially limited,
It is for instance possible to use use optical fiber as transmitting path 650 and using the mode of optical signal between each station 640, it is possible to
In the way of employing utilizes the signal of telecommunication, it is also possible to use communication.
As reference signal generator 610, apply above-mentioned reference signal generator 1.As previously described that
Sample, reference signal generator 610 receives satellite-signal, generates high-precision timing signal (1PPS), to outside
Output.Thereby, it is possible to realize the terrestrial digital communication net 600 of high reliability with lower cost.
Above, according to embodiment illustrated, to the reference signal generator of the present invention, electronic equipment, moving body,
Data communication equipment and terrestrial digital communication net are illustrated, but the present invention is not limited to this, the structure of each several part
The arbitrary structures with said function can be replaced into.Alternatively, it is also possible to other arbitrary structure additional.
It addition, in the above-described embodiment, it is judged that portion 72 is configured to according to scanning result signal, phase comparator 21
Comparison of signal phase and the comparison of signal phase of phase comparator 26, it is judged that the event of reference signal generator 1
Barrier state, but the invention is not restricted to this, for example, it is also possible to be configured to the phase bit comparison letter according to phase comparator 21
Number and phase comparator 26 comparison of signal phase in any one party and scanning result signal come judgment standard letter
The malfunction of number generator 1.
It addition, reference signal generator can also have, and the information exported from information output part is shown (notice)
Display part (notification unit).
It addition, in the above-described embodiment, enumerated as a example by the reference signal generator utilizing GPS,
In the present invention, it is not limited to GPS, it is also possible to utilize the GLONASS (GNSS) beyond GPS, example
Such as Galileo, GLONASS etc..
Claims (10)
1. a reference signal generator, it is characterised in that this reference signal generator has:
Acceptance division, it receives reference signal；
Comprise the 1st agitator of atomic oscillator；
1st phase comparator, it is carried out from the described signal of the 1st agitator output and the phase place of described reference signal
Relatively；
2nd agitator, it generates the signal to outside output；And
2nd phase comparator, it is to the signal from described 1st agitator output with from described 2nd agitator output
The phase place of signal compares,
Described 1st agitator has scanning result output unit, and the output of this scanning result output unit is vibrated with the described 1st
Device performs a scan the scanning result signal that the resonance signal obtained is corresponding,
This reference signal generator has judging part, and this judging part is according to the phase bit comparison of described 1st phase comparator
At least one in the comparison of signal phase of signal and described 2nd phase comparator and described scanning result signal,
Failure judgement state.
Reference signal generator the most according to claim 1, wherein,
Described acceptance division is the receptor receiving the satellite-signal sent from positional information satellite.
Reference signal generator the most according to claim 1 and 2, wherein,
Described judging part has failed storage portion, the storage of this failed storage portion and described comparison of signal phase and described scanning
The described malfunction that consequential signal is corresponding.
4. according to the reference signal generator described in any one in claims 1 to 3, wherein,
Described judging part has the scanning result storage part storing multiple described scanning results, at sentencing of described malfunction
The variable quantity of described scanning result is utilized in Duan.
5. according to the reference signal generator described in any one in Claims 1 to 4, wherein,
Described judging part is according to the comparison of signal phase of described 1st phase comparator, the phase of described 2nd phase comparator
Bit comparison signal and described scanning result signal, it is judged that described malfunction.
6. according to the reference signal generator described in any one in Claims 1 to 5, wherein,
This reference signal generator has information output part, and this information output part is according to the judged result of described judging part
Output comprises the signal of the information of regulation.
7. an electronic equipment, it is characterised in that this electronic equipment has any one institute in claim 1～6
The reference signal generator stated.
8. a moving body, it is characterised in that this moving body has described in any one in claim 1～6
Reference signal generator.
9. a data communication equipment, it is characterised in that this data communication equipment has appointing in claim 1～6
Anticipate a described reference signal generator.
10. a terrestrial digital communication net, it is characterised in that this terrestrial digital communication netting gear is had the right requirement 1～6
In the reference signal generator described in any one.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015109532A JP6544047B2 (en) | 2015-05-29 | 2015-05-29 | Reference signal generator, electronic device, data communication device, and terrestrial digital communication network |
| JP2015-109532 | 2015-05-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106199658A true CN106199658A (en) | 2016-12-07 |
Family
ID=57397316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610329484.3A Withdrawn CN106199658A (en) | 2015-05-29 | 2016-05-18 | Reference signal generator, electronic equipment, moving body and data communication equipment |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US10168434B2 (en) |
| JP (1) | JP6544047B2 (en) |
| CN (1) | CN106199658A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037517A (en) * | 2017-11-30 | 2018-05-15 | 成都天奥测控技术有限公司 | A kind of handheld navigation overall checkout equipment |
| CN110673691A (en) * | 2018-07-02 | 2020-01-10 | 纬创资通股份有限公司 | Electronic system, sensing circuit and sensing method |
| CN111596283A (en) * | 2019-02-19 | 2020-08-28 | 英飞凌科技股份有限公司 | Random hardware fault and degradation protection device for time-of-flight receiver |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061691A (en) * | 2018-08-10 | 2018-12-21 | 北京七维航测科技股份有限公司 | Crystal oscillator module control system based on Big Dipper satellite signal |
| CN113992236B (en) * | 2021-11-18 | 2023-03-24 | 上海方位角数据科技有限公司 | GNSS pseudo satellite time frequency cascade type synchronization system |
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| JPS5273661A (en) * | 1975-12-17 | 1977-06-20 | Nippon Telegr & Teleph Corp <Ntt> | Atomic oscillator |
| JPS6059822A (en) * | 1983-09-13 | 1985-04-06 | Fujitsu Ltd | Frequency converting circuit |
| US4899117A (en) * | 1987-12-24 | 1990-02-06 | The United States Of America As Represented By The Secretary Of The Army | High accuracy frequency standard and clock system |
| JPH0761013B2 (en) * | 1988-07-19 | 1995-06-28 | 富士通株式会社 | Cesium atomic oscillator |
| JPH0722945A (en) | 1993-06-30 | 1995-01-24 | Fujitsu Ltd | Rubidium atomic oscillator |
| JP4520061B2 (en) * | 2001-03-08 | 2010-08-04 | 富士通オプティカルコンポーネンツ株式会社 | Rubidium atomic oscillator |
| CN101128780B (en) * | 2005-02-24 | 2010-12-08 | 精工爱普生株式会社 | Clock signal output apparatus and control method of same, and electric apparatus and control method of same |
| JP2009284196A (en) * | 2008-05-22 | 2009-12-03 | Seiko Epson Corp | Oscillation circuit, electronic device provided with oscillation circuit and control method of oscillation circuit |
| JP2010232792A (en) * | 2009-03-26 | 2010-10-14 | Seiko Epson Corp | Atomic oscillator |
| JP5688905B2 (en) * | 2010-01-26 | 2015-03-25 | 古野電気株式会社 | Reference frequency generator |
| JP5923990B2 (en) * | 2012-01-16 | 2016-05-25 | セイコーエプソン株式会社 | Optical module and atomic oscillator for an atomic oscillator |
| JP5874522B2 (en) * | 2012-05-09 | 2016-03-02 | セイコーエプソン株式会社 | Oscillator and electronic device |
| JP6201585B2 (en) * | 2013-09-30 | 2017-09-27 | セイコーエプソン株式会社 | Timing signal generating device, electronic device, and moving object |
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- 2015-05-29 JP JP2015109532A patent/JP6544047B2/en not_active Expired - Fee Related
-
2016
- 2016-05-18 CN CN201610329484.3A patent/CN106199658A/en not_active Withdrawn
- 2016-05-23 US US15/161,735 patent/US10168434B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037517A (en) * | 2017-11-30 | 2018-05-15 | 成都天奥测控技术有限公司 | A kind of handheld navigation overall checkout equipment |
| CN110673691A (en) * | 2018-07-02 | 2020-01-10 | 纬创资通股份有限公司 | Electronic system, sensing circuit and sensing method |
| CN110673691B (en) * | 2018-07-02 | 2021-06-08 | 纬创资通股份有限公司 | Electronic system, sensing circuit and sensing method |
| CN111596283A (en) * | 2019-02-19 | 2020-08-28 | 英飞凌科技股份有限公司 | Random hardware fault and degradation protection device for time-of-flight receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6544047B2 (en) | 2019-07-17 |
| US20160349374A1 (en) | 2016-12-01 |
| JP2016225779A (en) | 2016-12-28 |
| US10168434B2 (en) | 2019-01-01 |
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Application publication date: 20161207 |